Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

sgl_imaging_challenge_banner_beauty_night_skies.thumb.jpg.2711ade15e31d01524e7dc52d15c4217.jpg

Dave_D

Rework of M51

Recommended Posts

Stumbled upon this excellent set of  PixInsight tutorials by Jason Brown here:

https://www.youtube.com/watch?v=X2gtU1olrRA&list=PLaGsNmS0IVAfwFtIDdBSWvBwkXgTpsHeq

Makes a huge improvement. My original crappy processing using the same data is top right. Just need to collect better data now as the original was with a 75% moon. not too sure what that dark line down the middle is though.

M51reprocess_zps3f61c90d.png

Edited by Dave_D
  • Like 6

Share this post


Link to post
Share on other sites

lots more detail in the arms very nice

I'm really chuffed with this. Both images were with the same original stacked data from DSS. It really is amazing how much detail can be pulled out by applying processes of someone with a lot more experience.  :grin:

Hopefully, future images will be in a different league now I have autoguiding sorted. Only thing i want to do is increase exposure length but I need a good LP filter which is sadly unattainable at the moment with being out of work.

Just wish i could get into narrow band with a mono CCD but that'll be a long way off.

Edited by Dave_D

Share this post


Link to post
Share on other sites

Excellent - that's some improvement, well done!

Sorry to hear you are currently out of work, but if there were some clear skies, I'm sure you'd find plenty to do!!!

What LP filter would you go for, ideally?

Share this post


Link to post
Share on other sites

What LP filter would you go for, ideally?

Not too sure really... either a clip filter or preferably something that screws onto my MPCC. Obviously, the ones i like cost silly money but y'know... that's what I get for having an expensive hobby  :laugh:

Share this post


Link to post
Share on other sites

Stumbled upon this excellent set of  PixInsight tutorials by Jason Brown here:

https://www.youtube.com/watch?v=X2gtU1olrRA&list=PLaGsNmS0IVAfwFtIDdBSWvBwkXgTpsHeq

Makes a huge improvement. My original crappy processing using the same data is top right. Just need to collect better data now as the original was with a 75% moon. not too sure what that dark line down the middle is though.

That's a really nice image Dave, it will be good to see it when you get more data as well.  I see what you mean about the dark lines in the image, there are quite a lot visible on my screen. I haven't the faintest idea what they are.

Tim

Share this post


Link to post
Share on other sites

Those bands are quite common with Canon cameras. I see you use Pixinsight, try the Canon banding reduction script. It's under Script -> Utilities -> CanonBandingReduction. 

Share this post


Link to post
Share on other sites

Nice capture of the M51 Dave and a lot more detail in the reprocess. I watched all his videos quite a few times before paying for PI, thare very good and simple to understand. You seem to have the same black coloumn syndrome in your capture that my first modded 1100d was suffering from but yours is quite subtle.

A.G

Share this post


Link to post
Share on other sites

Nice capture of the M51 Dave and a lot more detail in the reprocess. I watched all his videos quite a few times before paying for PI, thare very good and simple to understand. You seem to have the same black coloumn syndrome in your capture that my first modded 1100d was suffering from but yours is quite subtle.

A.G

Remember the gradient that was appearing at the bottom of the frame? well, from what i can see from following those tutorials, it seems to be caused by not setting the minimum sample weight correctly. Not had it since i started doing that, even on the same data that it was appearing on, on previous pics.

What i really need now is to get longer subs. Only managing 120s at the moment for various reasons.

Edited by Dave_D

Share this post


Link to post
Share on other sites

Nice imrovement.

Gradients (vignetting) on the bottom of the frames is usually from the mirror in the DSLR, on faster scopes it's usually best to crop it away instead of fixing it because of the high loss of signal in heavily vignetted areas.

Share this post


Link to post
Share on other sites

Nice imrovement.

Gradients (vignetting) on the bottom of the frames is usually from the mirror in the DSLR, on faster scopes it's usually best to crop it away instead of fixing it because of the high loss of signal in heavily vignetted areas.

yeah i get that sometimes. seems to depend on where my scope is pointing as i have a lot of LP and houses that keep their lights on 24/7  :laugh:

what's strange though is that i've had that gradient line along the bottom, on images i've cropped as well which led me to believe it was what i mentioned above.

Share this post


Link to post
Share on other sites

I'll have to look into this because I'm suffering the same issues as you and my galaxy pics always come out very blue.

Sent from my iPad using Tapatalk

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.